When the users visit the servers inside of the company from outside, it would loose connection without actions for a few minutes.
Add configuration of long-link on firewall like below:
firewall long-link aging-time 24
[sysname] acl 3002
[sysname-acl-adv-3002] rule permit tcp destination＊.＊.＊.＊.＊.＊.＊.＊
[sysname] firewall interzone trust untrust1
[sysname-interzone-trust-untrust1] long-link 3002 inbound
[sysname] firewall interzone trust untrust2
[sysname-interzone-trust-untrust2] long-link 3002 inbound
We wonder that maybe there are no configuration for long-link. And throught the session map we found that the problem may be caused by long-link.
For some certain use the session should not be time-out, and we need to configure long-link to solve the problem.